Device for producing oscillatory motion



- May 29, 1928. 1,671,301

J. MALY DEVICE FOR PRODUCING OSGILLATORY MOTION Filed April 30, 1927 Jaw/afar,

Patented May 29, 1928.

I JOSEF MALY, O1 MELNIK, CZECHOSLOVA KIA.

DEVICE FOR PRODUCING OSCILLATORY MOTION.

Application filed April 30, 1927, Serial No. 187,922, and in Czechoslovakia June 25, 1926.

This invention relates to a device for imparting oscillatory motion to sieves and shaking grates of milling, thrashing and other agricultural machines, its object being to obviate the additional friction and the inaccessible lubricating points incurred by the usual employment of crank-s for this purpose.

The invention consists in arranging the oscillatory element on a rock shaft carrying a lever arm whereon a pulley is mounted, a belt running on said pulley being fitted on its inside with projections which cause a bodily displacement of the pulley and rock the shaft.

The projections may be formed of arched bands of corrugated metal.

The invention is illustrated in the accompanying drawings in connection with a thrashing machine,

Fig. 1 representing a perspective view. of

the machine,

Fig. 2, a side view of the same, and

Fig. 8, a View on an enlarged scale of the oscillating device. M p

In the present instance the thrashing machine is fitted with a. shaking grate composed of bars 9 which are secured to a rock shaft f. Mounted on the latter is an arm e which carries a pulley 6. Another pulley (1 drives the pulley b by means of a belt 0 which is provided on its inside with one or more projections cl adapted to cause a bodily displace cases it may be necessary to introduce a spring for this purpose.

I claim:

1. A device for producing oscillatory motion comprising a rock shaft, a radial arn'i secured to said shaft, a pulley mounted on said arm at a distance from the shaft, a driving pulley supported by rigid bearings, a belt arranged on the two pulleys, and projections applied to the inside of said belt so as to cause a displacement of the driven pulley about the axis of the shaft.

2. A device according to claim 1 wherein the projections are composed of arched, corrugated metal plates.

JOSEF MALY. 

